González-Jiménez, Daniel and Bicego, Manuele and Tangelder, J.W.H. and Schouten, B.A.M. and Ambekar, Onkar and Alba-Castro, José Luis and Grosso, Enrico and Tistarelli, Massimo (2007) Distance measures for Gabor jets-based face authentication: a comparative evaluation. In: Advances in biometrics: International Conference, ICB 2007: proceedings, 27-29 August 2007, Seoul, Korea. Berlin - New York, Springer. p. 474-483. (Lecture Notes in Computer Science, 4642/2007). ISBN 978-3-540-74548-8. Conference or Workshop Item.
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Local Gabor features (jets) have been widely used in face recognition systems. Once the sets of jets have been extracted from the two faces to be compared, a proper measure of similarity (or distance) between corresponding features should be chosen. For instance, in the well known Elastic Bunch Graph Matching (EBGM) approach and other Gabor-based face recognition systems, the cosine distance was used as a measure. In this paper, we provide an empirical evaluation of seven distance measures for comparison, using a recently introduced face recognition system, based on Shape Driven Gabor Jets (SDGJ). Moreover we evaluate different normalization factors that are used to pre-process the jets. Experimental results on the BANCA database suggest that the concrete type of normalization applied to jets is a critical factor, and that some combinations of normalization + distance achieve better performance than the classical cosine measure for jet comparison.
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